212331131123 has 4 divisors (see below), whose sum is σ = 215018867040. Its totient is φ = 209643395208.

The previous prime is 212331131113. The next prime is 212331131141. The reversal of 212331131123 is 321131133212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212331131123 - 2⁶ = 212331131059 is a prime.

It is a super-2 number, since 2×212331131123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212331131113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343867840 + ... + 1343867997.

It is an arithmetic number, because the mean of its divisors is an integer number (53754716760).

Almost surely, 2^212331131123 is an apocalyptic number.

212331131123 is a deficient number, since it is larger than the sum of its proper divisors (2687735917).

212331131123 is an equidigital number, since it uses as much as digits as its factorization.

212331131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687735916.

The product of its digits is 648, while the sum is 23.

Adding to 212331131123 its reverse (321131133212), we get a palindrome (533462264335).

The spelling of 212331131123 in words is "two hundred twelve billion, three hundred thirty-one million, one hundred thirty-one thousand, one hundred twenty-three".